Ch 10 Vocab part 1

a type of history threat in which an unintended treatment is provided to particpants in a study that accounts for differences over time

a probelm created when differences in groups due to assignment account for the differences between groups in a study

loss of participants who have enrolled in a study. can occur for a number of reasons, including voluntary drop-out, relocation, or death. Also called mortality

adjustment of an alpha level to prevent a Type I research error; performed by dividing 0.05 by the number of comparisons

group leaders of the control condition or participants in the control group give up due to disappointment at not receiving the experiemental treatment

group leaders of the control condition or participants in the control group are harder to compensate for not recieving the experimental treatment

a type of sampling in which potential participants are selected based on the ease with which they can be included in a study

a statistical process of controlling for a variable that may be different between groups

the degree to which the environment in which a study takes place represents the real world

research that examines the usefulness of an intervention under real-world conditions. This type of research has strong external validity.

a study that examines whtther an intervention has a positive outcome. This type of study is typically conducted under ideal conditions to improve internal validity,

a threat to the validity of a study that is caused by the involvement of the researcher in some aspect of the study

the extent to which the results of a study can be generalized to a particular population, setting, or situation

searching for findings that the researcher did not originally plan to explore

name for the occurrence when research participants respond favorably to attention regardless of the intervention approach

the possibility that changes occurring over time, which influence the outcome of a study, are due to existing events

arises when problems with the instrument itself (eg. reliability, calibration) affect the outcome of a study

the ability to draw conclusions about causal relationships; in the case of intervention research, the ability to draw conclusions as to whether the intervention was effective

a process of assigning participants to groups in which individuals are matched on some characteristic (eg. gender, diagnosis) to ensure that equal numbers are assigned to each group